I observed a strange thing regarding case insensitive search in XE 11.2.0-1.0 and would like to know, if I am doing someting wrong, or if XE behaves wrong.

I have tables with columns of type NVARCHAR2. If I do a simple select with a simple "like" whereclause, I get the ORA-01401 error, without having a single idea, where this error comes from. Here is my sceanrio: